The video below shows how challenging it will be for golfers to play from the rough. Na couldn't even find his ball...

Fans commented on the video telling him to "stop complaining" and just "hit it straight." Well eventually Na couldn't hold back anymore and ever fired back the following comment.

"I said I like the golf course. I am not complaining! I am just showing golf fans what the conditions are this week! What i had at players champ was the yips! NOT slow play. Get over it! And Yes, I am thankful to do what I do. But I worked hard to get here. Not like someone just handed me my tour card."

The U.S. Open is traditionally one of the toughest challenges in all of golf. But Na isn't the only one one who has concerns with recent U.S. Open setups, as fellow pro Adam Scott voiced his frustration to Golf.com too.

So it sounds like there might be some pissed off golfers in Wisconsin this week.